BIOLOGY MIDDLE SCHOOL

contrast alleles are described as being dominant or recessive what is the difference between a dominant and recessive allele

Answers

Answer 1
Answer: dominant alleles can take over the recessive alleles if they were there 
and the other allele cant do the same as long as the dominant alleles don't 
come
Answer 2
Answer:

Answer:

dominant alleles can take over the recessive alleles if they were there

and the other allele cant do the same as long as the dominant alleles don't

come

Explanation:

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Answers

Answer:

What what

Explanation:

What would happen to your mass if the mass of the earth doubled?

Answers

Your mass will double, too!

A recessive allele t is responsible for a condition called distonia. A man who has this condition marries a woman who doesn't. One of their four children has the condition. What are the possible genotypes of the man and the woman? (Hint: To help you answer this question, create a Punnett square for each possibility.) A. Both parents are TT.
B. The father is tt; the mother is Tt.
C. The father is Tt; the mother is TT.
D. The father is tt; the mother is TT.

Answers

The correct answer would be: D.The father is tt; the mother is TT.
Look at this key:
TT-distonia
Tt-no distonia
So look at answer A. It says in your question that the man has the condition, but the woman does not. So the answer would not be A (TT). If the woman had the condition, that would be the answer.
Now look at B. Father has tt and mother has Tt. That means the father would not have the condition and the mother would not. So that's not correct either.
Now look at C. Father has Tt and mother has TT. That means that they both have it. 
Now look at the final choice: D. The father is tt and the mother is TT. The father has little t and little t, that is the 100% of having distonia. Mother has TT and not tt, so that means she will not get distonia. So that is correct.
And also, if there is a capital and lowercase letter next to each other, then think about it, the capital one is 'stronger', so it has that whatever case. 

Hope this helps! :-)

Favorable traits are traits that promote an organism's success in a particular environment. Organisms with favorable traits are more likely to thrive, survive, and reproduce than organisms without favorable traits. Over time, favorable traits are likely to________ within a population and unfavorable traits are likely to ________ within a population.

Answers

Answer: Grow ; Disappear.

Explanation:

The organism that best suits in the environment is likely to grow and reproduce and its population in the environment increases.

Over the time the characters that are favored more survive and the characters that does not allows the organism to survive in harsh conditions are not favored.

These organism die and over the time the traits disappear from the population.
1. Evolve/Grow
2. Disappear

It's because they can survive and reproduce while the unfavorable die off and cannot reproduce, so their traits disappear from the gene pool.

Name and desribe three ways to protect the world's biodiversity

Answers

Hey there! 

Three ways to protect the world's biodiversity are: 

1. Captive breeding: We capture and wait for two organisms of the same species to breed.

2. Laws: Create laws to limit the amount of organism killings.

3. Preserve Habitats: Preserve natural habitat so that animals can breed.

Thank you!  

What is the half-life of strontium-90? please explain your answer!

Answers

The right answer is 28 years.

The half-life, or period of a radioactive isotope, is the time required for half of the nuclei of this isotope initially present to decay naturally.

One gram of pure 90 strontium has a radioactivity of 5.11 TBq. Its beta radiation is not penetrating, which makes it difficult to measure when it is in the soil or a matrix. It is very harmful when the particle is inhaled or ingested.
28 years.

The half life is exactly what it means. We want to know how many years it takes for the Strontium-90 to go from 100% to 50% to 25% etc
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